react-doctor/react-in-jsx-scope

If on React 17+ with the new JSX transform, disable this rule; otherwise import React at the top of the file.

• Category: Correctness
• Severity: warn
• Source: oxlint-plugin-react-doctor
• Framework: global
• Enabled when: off by default (opt-in)
• Documentation: https://oxc.rs/docs/guide/usage/linter/rules/react/react-in-jsx-scope

Validation prompt

Use this to decide whether a fired diagnostic is real or a false positive.

Fires once per JSX usage (any JSXOpeningElement or JSXFragment) in a file where the identifier React is not bound anywhere in the module — relevant only to the classic JSX transform, which expands <a/> to React.createElement('a'). The check has no scope analysis: any module-level binding named React (import, var, function param, etc.) suppresses it for the whole file, matching OXC. False positive: projects on React 17+ using the automatic runtime (tsconfig jsx: "react-jsx" or Babel runtime: "automatic") never need React in scope, so every finding here is a non-issue and the rule should simply be off.

Fix prompt

Use this once validation confirms the diagnostic is real.

If the project targets the automatic JSX runtime (React 17+ with tsconfig jsx: "react-jsx" or Babel runtime: "automatic"), disable this rule rather than adding imports — React is injected for you. If you are genuinely on the classic transform, add import React from 'react'; at the top of the file so React.createElement resolves. See https://oxc.rs/docs/guide/usage/linter/rules/react/react-in-jsx-scope

Related rules

More Correctness rules from the rules reference:

• react-doctor/rendering-conditional-render: Change to `{items.length > 0 && <List />}` or use a ternary: `{items.length ? <List /> : null}`
• react-doctor/rendering-hydration-mismatch-time: Wrap dynamic time/random values in useEffect+useState (client-only) or add suppressHydrationWarning to the parent if intentional
• react-doctor/style-prop-object: Pass the `style` prop as an object literal like `{{ color: 'red' }}`, never a string or other primitive.
• react-doctor/void-dom-elements-no-children: Remove children from the void element, or use a non-void element if children are needed.
• react/jsx-key: Require a stable key on elements rendered from arrays or iterators so React can reconcile list items correctly.